Free online Calcudoku: no repeated digits in any row or column, and cages with sums, differences, products and divisions. Daily challenge and hints that explain. No ads.
A logic puzzle with digits: fill the board with no digit repeated in any row or column, so that the digits in each cage make their target: a sum, a difference, a product or a division. Short, calm games, comfortable to play with one finger.
No guessing. Every board has exactly one solution and is solved by reasoning. If you get stuck, the hint explains the next step in one sentence.
Three modes. Classic with four levels (from 4×4 to 7×7), a Daily challenge with the same board for everyone that grows through the week, and Zen with no timer.
Genuinely calm. No ads, no purchases and no accounts. Your games, stats and achievements stay on your device.
For everyone. Dark, light and high-contrast themes, pencil notes, left-handed controls and a reduce-motion option. In Spanish, Catalan and English.
Fill the board with the digits from 1 up to the board size without repeating a digit in any row or column. The cells are grouped into cages with a target and an operation: the digits in each cage, added, subtracted, multiplied or divided, must give that target. In two-cell cages with subtraction or division, start from the bigger digit.
Tips to get started